MESON Chess Problem Database
Problem Display
PID: 8171 (Qnq1N1Bn/2p1P1R1/8/1r3kP1/1p1P2r1/4RpPP/2NB4/3K3b w - - 0 1)
Lincoln, Robert A
The Problemist, 1995
#2
13 + 10
SOLUTION
- SOUND
- Sets
- 1...Qe6
- 2.Bxe6#
- 1...Qb7
- 2.Be6#
- 1...Qd8
- 2.Be6#
- 1...Qxe8
- 2.Be6#
- 1...Rxg3
- 2.Qe4#
- 1...Rxd4
- 2.Sxd4#
- 1...Re4
- 2.Qxe4#
- 1...Rxg5
- 2.Qe4#
- 1...Rd5
- 2.Qxd5#
- 1...Re5
- 2.Rxe5#
- 1...Rb6
- 2.Re5#
- 2.Qd5#
- 1...Rb7
- 2.Re5#
- 1...Sa6
- 2.Qxc8#
- 1...Sc6
- 2.Qxc8#
- 1...Sd7
- 2.Be6#
- 1...Sf7
- 2.Bh7#
- 1...c5
- 2.Sd6#
- 2.Re5#
- 2.Qd5#
- 1...c6
- 2.Sd6#
- 1...Qe6
- Tries
- 1.Re2?
- threat
- 2.Se3#
- 1...Rxg3
- 2.Qe4#
- 1...Rxd4
- 2.Sxd4#
- 1...Qe6
- 2.Bxe6#
- 1...Qb7
- 2.Be6#
- 1...Re4
- 2.Qxe4#
- 1...Rd5
- 2.Qxd5#
- 1...Re5
- 2.Rxe5#
- 1...Rb7
- 2.Re5#
- 1...Sc6
- 2.Qxc8#
- 1...Sg6
- 2.Rf7#
- 1...Sf7
- 2.Bh7#
- 1...c6
- 2.Sd6#
- 1...fxe2+!
- threat
- 1.Rxf3+?
- 1...Rf4
- 2.Se3#
- 2.Rxf4#
- 2.g4#
- 1...Bxf3+!
- 1...Rf4
- 1.Re6?
- threat
- 2.Se3#
- 2.Rf6#
- 1...Rxg3
- 2.Rf6#
- 2.Qe4#
- 1...Rxd4
- 2.Se3#
- 2.Sxd4#
- 1...Sf7
- 2.Rf6#
- 1...Qa6
- 2.Se3#
- 1...Qb7
- 2.Se3#
- 1...Re4
- 2.Rf6#
- 2.Qxe4#
- 1...Rd5
- 2.Se3#
- 2.Qxd5#
- 1...Re5
- 2.Rxe5#
- 2.Rf6#
- 1...Rb6
- 2.Se3#
- 2.Re5#
- 2.Qd5#
- 1...Rb7
- 2.Se3#
- 2.Re5#
- 1...Sc6
- 2.Se3#
- 1...Sd7
- 2.Se3#
- 1...Sg6
- 2.Rf6#
- 1...c6
- 2.Se3#
- 2.Sd6#
- 1...Qxe6!
- threat
- 1.Qxf3+?
- 1...Rf4
- 2.Qxf4#
- 2.g4#
- 1...Bxf3+!
- 1...Rf4
- 1.Qc6?
- threat
- 2.Qf6#
- 1...Qa6
- 2.Be6#
- 1...Qe6
- 2.Bxe6#
- 2.Qxe6#
- 1...Rb6
- 2.Re5#
- 2.Qd5#
- 2.Qc5#
- 1...Sd7
- 2.Be6#
- 2.Qe6#
- 1...Sxc6!
- threat
- 1.Re2?
- Keys
- 1.Re1!
- threat
- 2.Se3#
- 1...Rxg3
- 2.Qe4#
- 1...Rxd4
- 2.Sxd4#
- 1...Qe6
- 2.Bxe6#
- 1...Qb7
- 2.Be6#
- 1...Re4
- 2.Qxe4#
- 1...Rd5
- 2.Qxd5#
- 1...Re5
- 2.Rxe5#
- 1...Rb7
- 2.Re5#
- 1...Sc6
- 2.Qxc8#
- 1...Sg6
- 2.Rf7#
- 1...Sf7
- 2.Bh7#
- 1...c6
- 2.Sd6#
- threat
- 1.Re1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 5
- Sets
- Q(i);N_GUARD::B(M),XQ(i)
- Q(i);N_GUARD::B(M)
- Q(i);N_GUARD,XS(L)::B(M)
- R(d);N_GUARD,XP(E)::QAB1(K)
- R(d);P_PINB(C),XP(G)::S(B),XR(d)
- R(d);N_GUARD::QAB1(K),XR(d)
- R(d);N_GUARD,XP(H)::QAB1(K)
- R(e);N_GUARD::QAR2(K),XR(e)
- R(e);N_GUARD::R1(D),XR(e)
- R(e);N_GUARD::R1(D)
- S(h);OGATE::QAB(K),XQ(i)
- S(h);S_CUTQ(i)::B(M)
- S(j);N_GUARD::B(M)
- P(g);N_GUARD::S(L)
- Tries
- Try
- R(D);
- Threat
- S(B)
- Vars
- R(d);N_GUARD,XP(E)::QAB1(K)
- R(d);P_PINB(C),XP(G)::S(B),XR(d)
- Q(i);N_GUARD::B(M),XQ(i)
- Q(i);N_GUARD::B(M)
- R(d);N_GUARD::QAB1(K),XR(d)
- R(e);N_GUARD::QAR2(K),XR(e)
- R(e);N_GUARD::R1(D),XR(e)
- R(e);N_GUARD::R1(D)
- S(h);OGATE::QAB(K),XQ(i)
- S(j);N_GUARD,SBLOCK::R(J)
- S(j);N_GUARD::B(M)
- P(g);N_GUARD::S(L)
- Refutation
- P(b);CHECK,XR(D)
- Try
- R(D);CHECK,XP(b)
- Refutation
- B(a);CHECK,XR(D)
- Try
- R(D);
- Threat
- DUALS(2)
- Vars
- S(j);::R1(D)
- Q(i);::S(B)
- S(h);::S(B)
- Refutation
- Q(i);XR(D)
- Try
- Q(K);CHECK,XP(b)
- Refutation
- B(a);CHECK,XQ(K)
- Try
- Q(K);
- Threat
- QAR1(K)
- Vars
- Q(i);N_GUARD::B(M)
- Refutation
- S(h);XQ(K)
- Try
- Actual
- R(D);
- Threat
- S(B)
- Vars
- R(d);N_GUARD,XP(E)::QAB1(K)
- R(d);P_PINB(C),XP(G)::S(B),XR(d)
- Q(i);N_GUARD::B(M),XQ(i)
- Q(i);N_GUARD::B(M)
- R(d);N_GUARD::QAB1(K),XR(d)
- R(e);N_GUARD::QAR2(K),XR(e)
- R(e);N_GUARD::R1(D),XR(e)
- R(e);N_GUARD::R1(D)
- S(h);OGATE::QAB(K),XQ(i)
- S(j);N_GUARD,SBLOCK::R(J)
- S(j);N_GUARD::B(M)
- P(g);N_GUARD::S(L)
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